If unhandled, show an error message/call OnError before the stack unwinds (making exceptions consistent with runtime errors).

Fixed __Delete causing commands to throw even when Try is not used.

Fixed COM clients unable to catch built-in script errors.

Removed the limits on the number of custom modifiers that can be used with each key.
Changed Send {Text} to avoid toggling CapsLock or waiting for Win+L.
Fixed #Warn ClassOverwrite to not warn for A_Args.
Improved DBGp source command to properly convert between file codepage and UTF-8, and to reduce code size.
Other code size optimizations and trivial maintenance.